Ok, echo -1 > /sys/module/usbcore/parameters/autosuspend did the trick for my Benq 3300 S2W scanner.
It's a good idea creating a quirks list. But what makes me worry is, that in my opinion too less people will come to this bug page and post their problematic USB hardware ID. And I think that especially new Linux users, which Ubuntu tries to address, won't post their problematic hardware specs here. If their hardware won't work, and they search in ubuntuforums or somewhere and get an answer like: "you have to go to command line, insert a command, post it to this bugs page and wait a few weeks until an updated quirks list is available with a new kernel update" they maybe go further and won't use Linux any more. I do not know how many USB devices are affected from autosuspend, but it seems that these are a lot of people regarding to length of this report. I think it would be better to offer a dialog for people who have problematic hardware, that appends the line echo -1 > /sys/module/usbcore/parameters/autosuspend to /etc/rc.local for example. Maybe this is not a clean solution but better than having people with broken hardware to wait a few weeks/months until an updated quirks list with a new kernel is released. -- some usb_devices fault if usb_suspend enabled https://bugs.launchpad.net/bugs/85488 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
